Live on the East Coast and want to see Lifehacker's post timestamps on Eastern time? Sick of having to check the "preview comment" box every time you write a comment? In the tradition of the Better Gmail Firefox extension, today we present the Better Lifehacker extension, which adds useful functionality to Lifehacker and its sibling sites, including io9, Gizmodo, and Jezebel. After the jump, see what Better Lifehacker can do, download, and install it in your copy of Firefox.